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US Patent: 923,257
Twist Drill Improvements in Drill Bit Manufacturing
Patentee: Oscar Fredrickson (exact or similar names) - Buchanan, MI USPTO Classifications: 408/226 Tool Categories: metalworking machines : drilling and boring : drill bits : metalworking twist drills Assignees: Celfor Tool Company - Chicago, IL Manufacturer: Celfor Tool Company - Chicago, IL Witnesses: John R. Lefevre Eugene B. Clark	Patent Dates: Applied: Dec. 30, 1907 Granted: Jun. 01, 1909 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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